Journal
MATERIALS LETTERS
Volume 307, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.130967
Keywords
Solar energy materials; Surfaces; Silicon nanowires; Hybrid solar cells
Funding
- Ministry of Science and Technology of Taiwan [MOST 107-2221-E-006-013-MY3, MOST 110-2223-E-006-003-MY3]
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In this study, a facile, inexpensive, and reliable HNO3-based chemical passivation method was used to introduce SiOx coating on Si nanowires, resulting in significant improvements in cell performance with over 39% enhanced efficiency compared to reference cells. The impacts of light harvesting and charge separation characteristics on cell performance were deeply explored.
Surface recombination of photogenerated carriers turned to be critical issues against the realization of highperformance nanowire-based solar cells. To overcome it, the strategy toward passivating nanowire surfaces was essential where the improvement of minority carrier lifetime was identified in recent years; instead, the examinations of optical management as well as charge-transfer resistance at heterojunction were still limited. In this study, we herein investigated the facile, inexpensive and reliable HNO3-based chemical passivation that directly introduced SiOx coating on Si nanowires. By adjusting the oxidation durations, the cell performance exhibited the improved conversion efficiency with more than 39% of efficiency enhancement than reference cells. Impacts of light harvesting and charge separation characteristics on cell performances were in-depth envisioned.
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